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MN10300: Make the kernel jump into gdbstub on a BUG

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Make the kernel jump into gdbstub (if configured) on a BUG with the register
set from the BUG rather than interpolating another illegal instruction and
leaving gdbstub's idea of the process counter in unsupported_syscall() where
the original BUG was detected.

With this patch, gdbstub reports a SIGABRT to the compiler and reports the
program counter at the original BUG, allowing the execution state at the time
of the BUG to be examined with GDB.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Howells 2008-02-19 18:58:59 +00:00 committed by Linus Torvalds
parent 5efe92c680
commit aa409e028c
1 changed files with 1 additions and 1 deletions
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2
arch/mn10300/kernel/traps.c
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@ -391,7 +391,7 @@ static asmlinkage void unsupported_syscall(struct pt_regs *regs,
if (code == EXCEP_SYSCALL15 && !user_mode(regs)) {
if (report_bug(regs->pc, regs) == BUG_TRAP_TYPE_BUG) {
#ifdef CONFIG_GDBSTUB
__gdbstub_bug_trap();
gdbstub_intercept(regs, code);
#endif
}
}